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package javax.print.attribute.standard;

import java.io.Serial;

import javax.print.attribute.Attribute;
import javax.print.attribute.DocAttribute;
import javax.print.attribute.PrintJobAttribute;
import javax.print.attribute.PrintRequestAttribute;
import javax.print.attribute.SetOfIntegerSyntax;

/**
 * Class {@code PageRanges} is a printing attribute class, a set of integers,
 * that identifies the range(s) of print-stream pages that the Printer object
 * uses for each copy of each document which are to be printed. Nothing is
 * printed for any pages identified that do not exist in the document(s). The
 * attribute is associated with <i>print-stream</i> pages, not
 * application-numbered pages (for example, the page numbers found in the
 * headers and or footers for certain word processing applications).
 * <p>
 * In most cases, the exact pages to be printed will be generated by a device
 * driver and this attribute would not be required. However, when printing an
 * archived document which has already been formatted, the end user may elect to
 * print just a subset of the pages contained in the document. In this case, if
 * a page range of <code>"<i>n</i>-<i>m</i>"</code> is specified, the first page
 * to be printed will be page <i>n.</i> All subsequent pages of the document
 * will be printed through and including page <i>m.</i>
 * <p>
 * If a {@code PageRanges} attribute is not specified for a print job, all pages
 * of the document will be printed. In other words, the default value for the
 * {@code PageRanges} attribute is always {@code {{1, Integer.MAX_VALUE}}}.
 * <p>
 * The effect of a {@code PageRanges} attribute on a multidoc print job (a job
 * with multiple documents) depends on whether all the docs have the same page
 * ranges specified or whether different docs have different page ranges
 * specified, and on the (perhaps defaulted) value of the
 * {@link MultipleDocumentHandling MultipleDocumentHandling} attribute.
 * <ul>
 *   <li>If all the docs have the same page ranges specified, then any value of
 *   {@link MultipleDocumentHandling MultipleDocumentHandling} makes sense, and
 *   the printer's processing depends on the
 *   {@link MultipleDocumentHandling MultipleDocumentHandling} value:
 *   <ul>
 *     <li>{@code SINGLE_DOCUMENT} -- All the input docs will be combined
 *     together into one output document. The specified page ranges of that
 *     output document will be printed.
 *     <li>{@code SINGLE_DOCUMENT_NEW_SHEET} -- All the input docs will be
 *     combined together into one output document, and the first impression of
 *     each input doc will always start on a new media sheet. The specified page
 *     ranges of that output document will be printed.
 *     <li>{@code SEPARATE_DOCUMENTS_UNCOLLATED_COPIES} -- For each separate
 *     input doc, the specified page ranges will be printed.
 *     <li>{@code SEPARATE_DOCUMENTS_COLLATED_COPIES} -- For each separate input
 *     doc, the specified page ranges will be printed.
 *   </ul>
 *   <ul>
 *     <li>{@code SEPARATE_DOCUMENTS_UNCOLLATED_COPIES} -- For each separate
 *     input doc, its own specified page ranges will be printed.
 *     <li>{@code SEPARATE_DOCUMENTS_COLLATED_COPIES} -- For each separate input
 *     doc, its own specified page ranges will be printed.
 *   </ul>
 * </ul>
 * <p>
 * <b>IPP Compatibility:</b> The PageRanges attribute's canonical array form
 * gives the lower and upper bound for each range of pages to be included in and
 * IPP "page-ranges" attribute. See class
 * {@link SetOfIntegerSyntax SetOfIntegerSyntax} for an explanation of canonical
 * array form. The category name returned by {@code getName()} gives the IPP
 * attribute name.
 *
 * @author David Mendenhall
 * @author Alan Kaminsky
 */
public final class PageRanges   extends SetOfIntegerSyntax
        implements DocAttribute, PrintRequestAttribute, PrintJobAttribute {

    /**
     * Use serialVersionUID from JDK 1.4 for interoperability.
     */
    @Serial
    private static final long serialVersionUID = 8639895197656148392L;

    /**
     * Construct a new page ranges attribute with the given members. The members
     * are specified in "array form;" see class
     * {@link SetOfIntegerSyntax SetOfIntegerSyntax} for an explanation of array
     * form.
     *
     * @param  members set members in array form
     * @throws NullPointerException if {@code members} is {@code null} or any
     *         element of {@code members} is {@code null}
     * @throws IllegalArgumentException if any element of {@code members} is not
     *         a length-one or length-two array. Also if {@code members} is a
     *         zero-length array or if any member of the set is less than 1.
     */
    public PageRanges(int[][] members) {
        super (members);
        if (members == null) {
            throw new NullPointerException("members is null");
        }
        myPageRanges();
    }

    /**
     * Construct a new page ranges attribute with the given members in string
     * form. See class {@link SetOfIntegerSyntax SetOfIntegerSyntax} for
     * explanation of the syntax.
     *
     * @param  members set members in string form
     * @throws NullPointerException if {@code members} is {@code null} or any
     * element of {@code members} is {@code null}
     * @throws IllegalArgumentException if {@code members} does not obey the
     *         proper syntax. Also if the constructed set-of-integer is a
     *         zero-length array or if any member of the set is less than 1.
     */
    public PageRanges(String members) {
        super(members);
        if (members == null) {
            throw new NullPointerException("members is null");
        }
        myPageRanges();
    }

    /**
     * Validates the page ranges.
     */
    private void myPageRanges() {
        int[][] myMembers = getMembers();
        int n = myMembers.length;
        if (n == 0) {
            throw new IllegalArgumentException("members is zero-length");
        }
        int i;
        for (i = 0; i < n; ++ i) {
          if (myMembers[i][0] < 1) {
            throw new IllegalArgumentException("Page value < 1 specified");
          }
        }
    }

    /**
     * Construct a new page ranges attribute containing a single integer. That
     * is, only the one page is to be printed.
     *
     * @param  member set member
     * @throws IllegalArgumentException if {@code member < 1}
     */
    public PageRanges(int member) {
        super (member);
        if (member < 1) {
            throw new IllegalArgumentException("Page value < 1 specified");
        }
    }

    /**
     * Construct a new page ranges attribute containing a single range of
     * integers. That is, only those pages in the one range are to be printed.
     *
     * @param  lowerBound lower bound of the range
     * @param  upperBound upper bound of the range
     * @throws IllegalArgumentException if a {@code null} range is specified or
     *         if a {@code non-null} range is specified with {@code lowerBound}
     *         less than 1
     */
    public PageRanges(int lowerBound, int upperBound) {
        super (lowerBound, upperBound);
        if (lowerBound > upperBound) {
            throw new IllegalArgumentException("Null range specified");
        } else if (lowerBound < 1) {
            throw new IllegalArgumentException("Page value < 1 specified");
        }
    }

    /**
     * Returns whether this page ranges attribute is equivalent to the passed in
     * object. To be equivalent, all of the following conditions must be true:
     * <ol type=1>
     *   <li>{@code object} is not {@code null}.
     *   <li>{@code object} is an instance of class {@code PageRanges}.
     *   <li>This page ranges attribute's members and {@code object}'s members
     *   are the same.
     * </ol>
     *
     * @param  object {@code Object} to compare to
     * @return {@code true} if {@code object} is equivalent to this page ranges
     *         attribute, {@code false} otherwise
     */
    public boolean equals(Object object) {
        return (super.equals(object) && object instanceof PageRanges);
    }

    /**
     * Get the printing attribute class which is to be used as the "category"
     * for this printing attribute value.
     * <p>
     * For class {@code PageRanges}, the category is class
     * {@code PageRanges} itself.
     *
     * @return printing attribute class (category), an instance of class
     *         {@link Class java.lang.Class}
     */
    public final Class<? extends Attribute> getCategory() {
        return PageRanges.class;
    }

    /**
     * Get the name of the category of which this attribute value is an
     * instance.
     * <p>
     * For class {@code PageRanges}, the category name is {@code "page-ranges"}.
     *
     * @return attribute category name
     */
    public final String getName() {
        return "page-ranges";
    }
}
